https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60040
Matthijs Kooijman <matthijs at stdin dot nl> changed:
What |Removed |Added
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CC| |matthijs at stdin dot nl
--- Comment #8 from Matthijs Kooijman <matthijs at stdin dot nl> ---
Seems not - just tried with avr-gcc 5.1 and it is still broken:
$ avr-gcc -fpreprocessed -w -mmcu=atmega128 -O2 -s test.i -o /dev/null
test.i: In function 'rtems_fdisk_recycle_segment':
test.i:107:1: error: unable to find a register to spill in class
'POINTER_REGS'
}
^
test.i:107:1: error: this is the insn:
(insn 30 29 31 2 (set (reg:HI 26 r26)
(reg/v/f:HI 51 [ dpd ])) /home/matthijs/test.i:95 83 {*movhi}
(nil))
test.i:107: confused by earlier errors, bailing out
$ avr-gcc --version
avr-gcc (GCC) 5.1.0
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is
NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.
On the Arduino bugtracker [1], another testcase with the same symptoms was
reported. I'm attaching that here. This testcase works with -O2, but
breaks when -Os is used.
$ avr-gcc -c -Os -mmcu=atmega328p test2.c -o /dev/null
test2.c: In function 'getSlope':
test2.c:22:1: error: unable to find a register to spill in class
'POINTER_REGS'
}
^
test2.c:22:1: error: this is the insn:
(insn 40 38 42 3 (set (reg:SF 63 [ D.1613 ])
(mem:SF (post_inc:HI (reg:HI 16 r16 [orig:73 ivtmp.13 ] [73]))
[1 MEM[base: _27, offset: 0B]+0 S4 A8])) /home/matthijs/test.c:15 100 {*movsf}
(expr_list:REG_INC (reg:HI 16 r16 [orig:73 ivtmp.13 ] [73])
(nil)))
test2.c:22: confused by earlier errors, bailing out
[1]: https://github.com/arduino/Arduino/issues/3972
